1. Marriage and divorce rates can be examined using the method of ________.
2. Using the method of _______ researchers cannot influence the subjects by their presence.
3. The first scientist who began to formulate a theory of intellectual development was ______ .
4. Group decision-making is usually analyzed by ________.
5. Children’s thoughts of mind are studied by ________.
6. In ________ researchers observe people’s behaviour without intervening it.
7. A researcher is able to change one factor leaving others constant only while conducting an _______.
8. The measured aspect of the experiment is called the _______.
9. One of the requirements for conducting an experiment is the use of a _______.
11. The difference between two groups in the experiment can be attributed to the presence of _______.
4. Present the additional information on other methods of research you’ve found to your groupmates using the following scheme:
1. Name of the method.
2. Historical reference.
3. Aspects that can be learned using this method.
4. Fields of application of the method.